In this work, we will investigate the form factors of \(\Xi _{c}\rightarrow \Xi \) 
in QCD sum rules (QCDSR). QCDSR is a QCD-based approach to deal with
hadronic parameters. It reveals a direct connection between hadron
phenomenology and QCD vacuum structure via a few universal parameters
such as quark condensates and gluon condensates. The three-point QCDSR
has been widely used in studying the transition form factors. In
[1]}, we derived the form factors of doubly heavy baryons
to singly heavy baryons using QCDSR for the first time, and our approach
was tested in [2]}. In this work, the validity of the three-point
sum rules will be further tested. It is worth noting that HQET sum
rules can be reproduced by taking the heavy quark limit, as can be
seen in [3]}, [4]}, [5]}.
